Scenario Overview

In this scenario we have a custom field on the Account form called 'Oldest Contact' which needs to be populated. The business rules states it should be populated with the oldest contact by Age linked to the Company. 

The business rule should be set-up so each time the  birthday datetime field changes on the contact record the calculation should run & set the field on the Parent Account record.

North52 Decision Suite Solution

The North52 Decision Suite solution works like this,

  • A formula of type 'Save To Parent' is created
  • It is configured so that each time the birthdate field changes on the contact record it executes
  • On execution it performs a fetch-xml query to find all the related contacts sorted by the birthdate field
  • As the set of contacts are sorted by birthdate we know the first one in the list is the oldest
  • So we set the 'Oldest Contact' field on the parent account with the first contact in the set of contacts via the FindValueFD() function which always  accesses the first row of a set of data

North52 Decision Suite Steps

The following set of steps outline how to create this Formula

  • Create a new formula of type 'Save To Parent'
  • Set the Source Entity to 'Contact'
  • Set the Source Property to 'Birthday'
  • Set the Relationship field to 'parentcustomerid (account)'
  • Set the Target Property to 'Oldest Contact'
  • Copy & paste the formula below into the formula 
  • Click save
  • Create a new formula details \ fetch-xml query record by clicking on the 'Plus' icon in the subgrid.
  • Give it a name of 'AllContacts'
  • Copy & paste the fetch-xml below into the query field
  • Click Save
  • You are now ready to test


if( ContainsData(FindValueFD('AllContacts', 'contactid', '?') ) , 

     Setlookup( FindValueFD('AllContacts', 'contactid', '?') ),


Fetch XML

<fetch version="1.0" output-format="xml-platform" mapping="logical" distinct="false">
  <entity name="contact">
    <attribute name="fullname" />
    <attribute name="contactid" />
    <attribute name="birthdate" />
    <order attribute="birthdate" descending="false" />
    <filter type="and">
      <condition attribute="birthdate" operator="not-null" />
      <condition attribute="parentcustomerid" operator="eq" value="@parentcustomerid@" />

Wizard - FindValueFD

Please see below the wizard you can use to create the FindValueFD() function call used in this formula. 

Note to find the value for Formula Details (Query ) , you will need to go to the Fetch- Xml tab and create the necessary Fetch Xml shown above. 

Did you know?

North52 Decision Suite helps streamline complex business processes

North52 Decision Suite is a cloud-based or on-premise decision management/decision engine platform for the Dynamics 365 and Power Platform that uses data, analytics and business rules to automate decisions.

Companies use North52 to streamline their processes, improve the quality of the decisions inside their Dynamics 365 systems, and shorten the time it takes to adjust to business and competitive changes.

Learn more about the North52 Decision Suite